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Get the engine and coolant to operating temperature. The upper hose to the radiator should NOT get warm over time, but should get HOT when the thermostat opens. If it warms, then it is leaking and allowing coolant to bypass, and you won't get full heat.
Once warm, check BOTH hoses to the heater core, on the passenger side, the 5/8-3/4" diameter pair. BOTH should get too hot to keep touching. If only one is hot or warm, your heater core is likely clogged or plugged, and restricting coolant flow. Flushing may help, and if not, replacement should cure that problem. tom
Your thermostat may be stuck open and your coolant isn't getting hot to warm the cab.Here's a link on how to replace,very easy to do.Don't let your pets near spilt coolant,will kill them.
i would check your coolant level..sometimes if you get low your heater core (what heats the cab) will not flow warm coolant through it thus not heating...Another problem could be a plugged heater core..which isnt allowing coolant to flow through..in this case your can have the system flushed for around 80-100 bucks good luck
I have the same truck, I have flushed the radiator both ways, flushed the heater core both ways flushed the engine four times, I have owned this truck for eight years and still cannot get it to heat up the cab. It will keep the windshield defrosted but that is all. If you find any tricks to fix this let me know PLEASE
squirrel cage (from what i understand is the name) could be bad. its essentially the fan type blade looks kind of like a hamster wheel could have stopped rotating and isnt blowing the air into the cab. also could be your water pump. if the blade on the pump is bad then it could be circulating enough water to keep the truck cool but not enough pressure to send it to the heater core to generate the heat needed.
The heater core is leaking,this is what fills with coolant,and heats up from the engine,and the blower pushes the warm air from the heater core into the cab.The garage would be the best bet to replace the heater core for you.
Hello, No! I'm assuming that the temp gauge is working in truck & you are not over heating. On the passenger side firewall check both hoses going to/from heater core. If both are not warm then it is probably a heating core plug. You will have to replace the heater core.
Sadly "there" explanation is probly correct, when you say you have some but not alot of heat on low and then almost non on high, that is due to a plugged heater core. A heater core acts as a miniature radiator inside your cab. When the fan passes the air by it it picks up the heat and blows that into the cab. While doing that it also cools down the heater core. The more are you pass by it the cooler the core gets. What you can try first before replacing it is a coolant flush. This will run a mild acid like sollution through your entire cooling system. Sometimes that alone is enough to let more hot antifreeze run into your heater core thus giving you more heat. Another option is to disconect both lines into your heater core from in the engine compartment and run a hose into one , leaving the other to drain out. Depending on how plugged it is sometimes you can "Flush" out the buildup this way as well. G'luck and keep warm!
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